fix(Data source ): repeatedly retrieves schema

Author: dataeaseShu

frontend/src/views/ds/DatasourceForm.vue

@@ -341,16 +341,13 @@ const check = () => {
     }
   })
 }
-
-const getSchema = () => {
+const getSchema = debounce(() => {
   schemaList.value = []
   const requestObj = buildConf()
   datasourceApi.getSchema(requestObj).then((res: any) => {
-    for (let item of res) {
-      schemaList.value.push({ label: item, value: item })
-    }
+    schemaList.value = (res || []).map((item: any) => ({ label: item, value: item }))
   })
-}
+}, 300)
 
 onBeforeUnmount(() => (saveLoading.value = false))